Yin and yang bed usually need to install the device in addition to pre-salt mechanical filters and activated carbon filters, effectively extending the life of the resin, to ensure that water quality standards. Yin and yang bed except saline effluent conductivity equipment generally: 1uscm below, in addition to large-scale power plant equipment systems after saline treatment conductance up to 0.5us / cm, the sodium ions in the 10ug / l or less. If you need a higher purity of demineralized water, the need to increase the mixed bed, demineralized water mixed bed after treatment, conductivity 0.06us / cm, resistance 17-18M above, meet the high-pressure boiler feed water standards.